In a pie chart, different sectors represent different categories with their central angles proportional to the data values. The sum of all central angles in a pie chart is 360∘. If the total marks obtained by a student were 540 , we can use the central angles to find the marks obtained in each subject. Calculation: Determine marks per degree The total central angle of a pie chart is 360∘. The total marks obtained by the student are 540 . So, marks per degree can be calculated as Marks Per degree =540∕360=1.5 Marks per degree Calculate the marks for Mathematics and English Mathematics: The central angle is 90∘. so the marks obtained in Mathematics are: ⇒90×1.5=135 marks English: The central angle is 50∘. so the marks obtained in English are: ⇒50×1.5=75 marks The difference in marks between Mathematics and English is ⇒135−75=60 Marks